Camera viewer

ABSTRACT

A camera viewer in the form of a box-shaped housing which is open at the front side. The operative element within the viewer housing are secured and placed through fastening elements in the form of spring and/or fixed supporting, clamping, retaining, and receiving arrangements. Stray light and reflection are reduced or eliminated through the application of ribs, projections, and studs which are integrally formed with the interior surfaces of the viewer housing. Part of the elements within the viewer interior are recessed within the inner surfaces of the viewer housing.

United States Patent 1191 Lange 1 1 Jan. 23, 1973 [54] CAMERA VIEWER 3,057.249 10/1962 Miles ..88/l.5 R

' 3,393,620 7/1968 Reiche etal ..95/11 R [75] Inventor: Karl Heinz Lange, Enmgloh, Ger- 3,035,501 5/1962 Peterson ..88/1.5 R X early Assignee: Baldo Werke Photographische Gerate und Kunststoff R. Gruter Kommandite-gesellschaft,Westphalia, West Germany Dec. 16, 1970 Appl. No.: 96,758

[22' 7 Filed:

[30] Foreign Application Priority Data Jan. 20, 1970 Germany ..P 20 02 361.4

[56] References Cited UNITED STATES PATENTS Gutmann et al. ..95/44 R 5/1960 OBrien et al ..88/l.5 NR

FOREIGN PATENTS OR APPLICATIONS 3/1966 Germany ..88/1.5 R 9/1966 Great Britain ..95/1 1 R Primary Examiner-Robert P. Greiner Att0rneySparrow and Sparrow [57] ABSTRACT 23 Claims, 11 Drawing Figures PATENIEDJAH23 I975 3,712 196 SHEET 1 BF 7 I M TG RI Kar/ Hem; [0'3 g and Spam HTTornup PATENTEDJAH 23 I975 snw Q m 7 PATENTEU JAN 23 I975 SHEET s or 7 QN- 00p 0- a. v1... u v

CAMERA VIEWER BACKGROUND OF THE INVENTION The present invention relates to the construction of a housing for a camera viewer with a mirrored field border or limit, and mirrored photographic operating symbols, as well as the process for producing such a viewer housing. Camera viewers with vision field borders or limits, sometimes called light frame viewers, serve to aid the camera user in the selection of the desired picture portion. The basic concept of such light frame viewer is generally known.

In one arrangement known in the arts, :1 light frame viewer is provided, for example, with essential optical elements in the form of a collimating lens mirror, etc., in the front of the viewer inner state. They are held in place with pressure springs through retaining parts. They are secured against slippage through cement or a form of securing adhesive. The disadvantage of such a design however, is that the precise location of the essentially optical elements are dependent upon the precision of fabrication of the retaining parts. As a result, when the dimensions of these partsdeviate relative to the upper surface mirror, an adjustment must be made in an additional operating step through an adjusting screw. The latter adjusts the light frame visible within the viewer. Furthermore, the securing of the structural element through cement or adhesive is time consuming and thereby not desirable for assembly.

In another arrangement known in the arts, the abovementioned disadvantages are avoided. This is due to the condition that riding recesses are provided for the optical element in a viewer housing which is opened at the top. The lens and mirror can be inserted into these recesses which must be made narrow so that the optical element remains fixed in the desired location, and are secured against slippage resulting from vibrations. The

disadvantage of this arrangement is that the statically determined three point support must be dispensed with in view of the associated cost and precision. For the guiding recesses, moreover, deep, nonconical, disadvantageous slots become necessary, and very narrow tolerances are required for the width of the slots. These features are essential in order to provide the optical parts with a firm seating. A further disadvantage of such an arrangement has been found in that the viewer housing which is open at the top does not possess the necessary stability against wind. As a result, temperature variations and prevailing internal stresses lead to deformation which, in turn, require adjustment of the light frame in the viewer housing. Other conventional light frame viewers also exhibit a number of disadvantages, particularly with respect to the cost of fabrication, and do not provide for simple and rapid assembly, as well as time-saving adjustment.

Accordingly it is an object of the present invention to provide a method and arrangement for producing a light frame viewer of particularly simple designflt is also the object of the present invention to provide an arrangement which avoids the preceding disadvantages and errors by not requiring high accuracy in the mounting and positioning of the optical elements.

In accordance with the present invention, these objects are achieved by providing a viewer housing which is box-shaped and which is open at the front side. Within the interior of the viewer housing, supporting,

clamping, retaining, and gripping arrangements are provided for the viewer elements. Rasters, projections, ribs, and studs are provided as means for diminishing or eliminating stray light or reflections. These are extended into the inner surfaces of the viewer space and are formed as an integral structure with the viewer housing. Some parts of the arrangement are also reset within the interior surfaces of the housing.

At the same time, this light frame viewer is a new development in camera design, and is removed from conventional camera design, which consists of a camera housing with a deep-drawn camera cover for receiving the viewer. This camera cover is placed on top of the camera housing and secured through screws. This camera cover is also used for receiving brightness measuring means as well as distance finders. At the bottom of the conventional camera housing is a bottom cover which is screwed to the camera housing. Instead of such conventional design, the present invention provides for a box-shaped basic member which possesses the necessary dimensions and which has the aforementioned elements built in within its interior space. In the new camera design of the present light frame viewer, the viewer housing is formed integrally with the camera housing, so that the box-shaped viewer is formed through the camera rear wall and the camera outer walls.

A further advantage of the present invention of the light-frame viewer resides in the condition that the fonned viewer housing can be deformed at the front, in the same manner as the camera housing. This is due to the feature that the interior surfaces of the viewer housing including all supporting, clamping, retaining, and gripping receiving arrangements, as well as all arrangements for diminishing or eliminating stray light and reflection, are formed through displaceable, pivotable or inclined parts.

The use of such displaceable parts of plastic form, is generally conventional. However, heretofore no design has been suggested for a viewer housing for producing a construction which may be economically fabricated, as in the case with the present invention. The construction of the present invention, furthermore, allows assembly in an uncomplicated manner through the application of a new camera concept involving the aid of displaceable formed parts.

Included with the advantages of the design of the present invention, is that a compact unit of small dimension is achieved by forming the viewer housing onto the camera housing. This results from the condition that the space necessary for securing the mirror housing may be avoided. Furthermore, by building in the viewer housing within the walls of the camera housing, the walls may be made of lighter construction. Simplified assembly in fabrication is, moreover, realized, particularly with respect to the positioning precision of the optical elements. No cement or adhesive substance is, in addition, required with the present invention, and costly adjustments may be omitted.

The advantageous construction of the present light frame viewer provides, in addition, for space saving built in electronic elements for electrical control or indicating arrangement, as well as the photo resistor necessary for determining the exposure time electronically. The photo resistor is in the center of both viewer SUMMARY OF THE INVENTION A camera viewer arrangement in which the viewer is in the form of a box-shaped housing that is opened at the front side. The opticalviewer elements within the housing are fastened in place through spring and/or fixed supporting, clamping, retaining and receiving arrangement. Ribs, projections, and studs serve to diminish or eliminate altogether stray light and reflections.. The fastening element extend into the interior space of the viewer and are integrally formed with the viewer housing. Some of the passing elements are reset within the interior surfaces of the housing. The fastening elements as well as those for reducing stray light and reflections, are made or formed pivotal and displaceable elements, or they are made of parts mounted on inclined planes. The viewer housing may be integrally formed with the camera housing, so that the box-shaped configuration is formed through the camera rear wall and the camera exterior walls.

Various further and more specific purposes, objects, features and advantages will. clearly appear from the detailed description given below taken in connection with the accompanying drawings which form part of this specification and illustrate merely by way of example embodiment of the device of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the following description and in the claims, parts will'be identified by specific names for convenience, but such names are intended to be as generic in their application to similar parts as the art will permit. Like reference characters denote like parts in the several figures of the drawings in which:

FIG. 1 is a partial isometric view of the interior of the camera housing in accordance with the present invention;

' FIG. 2 is a plan view of the interior of the viewer housing with the covering surface removed, and shows the arrangement of the viewer lenses and mirrors, as well as the camera covering elements at the front side with the light frame plate and viewing covering disc;

FIG. 2a is a sectional view taken along line "-11 in FIG. 2, and shows the ocular lens mounted in place, as well as the mounting of the viewing covering disc;

FIG. 2b is a front view of FIG. 2a;

FIG. 20 is a sectional view taken along line ll-II in FIG. 2, and shows another embodiment for securing in place the ocular lens.

FIG. 2d is a plan view of FIG. 2c;

FIG. 3 is a front view of the light frame plate which viewing opening and diaphragm sleeve for the photo resistor, as well as the lamp screening means and the film strip with the photographic operating tables;

FIG. 4 is a sectional view taken along line II-II in FIG. 2, and shows the plastic embodiment for the viewer housing in closed position;

FIG. 5 is a sectional view taken along line IIII in FIG. 2, it shows separated halves of the plastic form of the viewer housing, together with slides gliding on inclined planes thereof as well as clamping elements and retaining ribs formed on the interior surfaces of the viewer housing.

FIG. 5a is a half sectional view taken along line II-II in FIG. 2, and shows a further embodiment for the construction of the plastic form for the viewer housing, by using displaceable parts at right angles to the viewer axis;

FIG. 5b is a half sectional view taken along line 11-11 in FIG. 2 and shows a still further embodiment for the construction of a plastic form by using pivotable parts which pivot for separating the inner surfaces of the viewer.

DESCRIPTION OF PREFERRED EMBODIMENTS Referring to the drawing and in particular to FIG. 1, the interior base of the viewer 2d of the camera 1 is formed at the top through the camera outer wall 1a and on the right side through the camera outer wall 1b. The

border at the bottom is established through the viewer wall 2a attached to the camera rear wall 1c, as well as through the viewer housing-wall 2b at the left side. At the top camera outer wall 1a and the lower viewer housing wall 2a, are the arrangements for the clamps and retaining ribs for the viewer mirror and lenses. These lie opposite to each other in mirror-fashion.

The upper surface mirror 3 shown in FIG. 2, is held on the viewer housing wall 2a, through the fixed supporting elements 4a and 5a, as shown in FIGS. 1 and 2. This mirror 3 is also held in place through a spring support and a third spring support 6a, as well as the oppositely lying supports 4b and 5b and through the spring support 6b. The partially transmitting mirror 9 is similarly held in place. At the lower viewer housing wall 2a, it is held in place through the supporting elements 9a and 10a, and through the spring support 11a. At the top camera outer wall la, the support is realized through the supporting elements 9b, shown in FIGS. 2 and 2a, the supporting elements 10b and through the spring support 11b. The pressure effects of the spring supports 6a and 6b, 1 la, 11b, become thereby achieved by providing two recesses 71:, 7b, 12a, 12b for each spring support element. These recesses are dimensioned so that they allow a narrow ridge 8a, 8b and 13a, 13b. This ridge will retract in a spring manner with specific material and subject to specific force effects, so that four corresponding spaces tolerated between the abutting elements or supporting elements 4a, 5a, 4b, 5b, 9a, 10b, and the spring support elements 6a, 6b, 11a, 11b, the spring return of the bridge 8a, 8b, 13a,

13b is sufficient to produce applied pressure for the I upper surface mirror 3 and the partially transmitting mirror 9. The applied pressure is such that inadvertent operation or slippage is prevented even under severe vibrational conditions.

Within the interior space 2d of the viewer, furthermore, the retaining ribs 14a and 14b for the collimating lens 15 are formed at the lower viewer housing wall 2a and the upper camera outer wall 1a, as shown in FIGS. 1 and 2.

Together with the supporting, clamping, and arrangements 4a, 5a, 6a and 14a, etc., for receiving the optical viewer element 3, 9, l5, l8, ribs, studs or projections, screens and supporting surfaces can be provided at the oppositely lying inner surfaces 1 f, 2f of the viewer housing 2, as shown in FIG. 2b. Such design can be effective against stray light and reflections. For purposes of clarity, however, these ribs, projections, screens and supporting surfaces are now shown in the described embodiment. Ribs may also be provided perpendicular to the camera rear wall 10, shown in FIG. 1, for the purpose of diminishing or eliminating stray light. In accordance with the embodiment illustrated, only 1 rib 16 shown in FIGS. 1 and 2, is illustrated. This rib 16 holds the collimating lens in the position described above, together with the rib42 of the light frame plate 20, shown in FIGS. 2 and 2a.

In the camera rear wall 10, is also the viewer entrance opening 17, in front of which an ocular lens 18 slips in a manner to be described. Beneath the viewer entrance opening 17, a retaining rib 17a, shown in FIG. 2, is formed on the inner surface 2f of the lower viewer housing wall 2a, for the purpose of securing the ocular lens 18. The retaining projection 17b, shown in FIG. 2a, is provided at the opposite lying inner surface If of the upper camera outer wall la. The ocular lens 18 has a nose shape portion 18b, shown in FIG. 2a, attached to the frontal side 180 above the center of the lens. The lens also has an extension 18a, shown in FIGS. 2a and 2b at the oppositely lined edge of the lens. The noseshaped portion 18b of the ocular lens 18 reaches behind the retaining block or projection 17b, and the extension 18a reaches behind the retaining ribs 17a of the viewer housing wall 2. In this manner, the ocular lens 18 is pressed into the desired position.

Another method for attaching the lens is shown in FIG. 2c and 2d. In this embodiment, the attachment is accomplished through a spring member with a tongueshaped portion 18d, which is formed through means of a U-shaped recess 180 in the camera outer wall la. This tongue 18d grips behind the nose-shaped portion 18b of the ocular lens 18.

A surrounding recess 19, shown in FIG. 1, the frontal edges of the walls la, lb, 2a, which enclose the interior space 2d of the viewer, serve the purpose of receiving a light frame plate 20, shown in FIG. 2, and to fix that plate in place. The light frame plate 20 possesses a circular-shaped recess 22 at its center, for the purpose of accommodating a photo resistor 21. The recess 22 is provided with a concentric retaining circular rim 23. The diaphragm sleeve 24 with its attached flange 25 is pressed into the circular rim 23. In this manner, the photo resistor 21 cannot drop out, as shown in FIG. 2. At its other end, the diaphragm sleeve 24 has also a concentric retaining circular rim 26 for accommodating a diaphragm disc 27 with. the diaphragm opening 28. To the left of the diaphragm sleeve 24 are ducts or openings 29a to 29d of the light frame 29 in the plate 20, as shown in FIGS. 2 and 3. The light frame 29 is mirrored into the viewer. On the inner surface 30 of the light frame 29, and in the lower half, is a rectangularshaped recess 31, which possesses a cutout 32. A rim 33 surrounds the recess 31. This rim 33 reaches into a surrounding recess 34 of a covering housing 35, and serves to accommodate or receive and fix in place said housing.

A film strip 39 is joined or glued to the base 36 of the recess 31. The film strip 39-is provided with starting symbols 37 and 38. An incandescent lamp is provided in the interior space 40 of the covering housing 35, as

shown in FIG. 2 and 3. On the side of the light frame plate 20 facing the interior space 2d of the viewer, a further rib 42 is in the region of the collimating lens 15, for the purpose of decreasing the stray light and to retain the collimating lens 15 in place. As shown in FIG. 2, a covering wall 43 is provided at the left end, which closes a recess 2c in the side wall 2b of the viewer housing 2. This recess 2c is necessary for the built-in upper surface mirror 3.

The covering wall 43 is seated on the frontal side of the light frame 20, and reaches into the recess 50 at the front side of the camera cover 49. The covering wall 43 secures the light frame plate 20 against sidewise displacement and falling out of place, in conjunction with the retaining rim 51 and the abutting 48 of the camera cover 49. In the right-hand portion, the light frame plate 20 discloses the viewing opening 44. In front of the light frame plate 20, lies a viewing cover disc 45 with a viewer lens 46 attached thereto. A collimating or collector lens 47 for the photo resistor 21 is also attached to the viewing cover disc 25. Light frame plate 20 and viewing cover disc 45 are held in place through the front camera cover 49 which as a recess 50 for receiving and securing in place the two parts 20 and 45. The recess 50 is provided with a retaining or supporting rim 51 and an abutting rim 48. The rim 48 extends at the left side and at the lower side around the viewer window 52 of the camera cover 49. At the same time, the camera cover 49 has a circumferential rim 53 which has 3 steps. The first and second steps 54 and 55 serve as fixing retainers in conjunction with the camera sides recess 19. The third step 56 serves as the border for the covering angle or plate within the recess 57 which extends around the side of the camera. The third step 56 can also serve for holding the gasket 58 in place. For improved handling of the camera housing during the individual operating procedures, the viewer covering disc 45 is provided with projection 45a and 45b formed onto the side surfaces 450 and 45d, as shown in FIG. 2a. These projections expend into corresponding recesses lg and 2g of the viewer housing 2, and hold the viewer covering disc 45 in place. In this manner, the inserted light frame plate 20 and the parts 35 and 24 attached thereto, cannot fall out while carrying out the operating procedures for the camera.

As may be further seen from FIG. 4, the left half 59 of the plastic unit forms the outer side 1d of the camera rear wall 10 with the viewer entrance opening 17. The contour 60a of the right half 60 of the unit or form, shapes the outer surface le of the upper camera exterior wall la, whereas the contour 60b of the right half 60, forms the outer surface 2e of the lower viewer housing wall 2a. In the interior space 2d of the viewer, is the form slide 63, 64 on the outer surfaces 61, 62 of a tapered portion 60c of the right half 60. The slide 63, 64 form the inner surface If of the upper cameral wall la and the inner surface 2f of the lower viewer housing wall 2a. This includes all supporting, clamping, retaining and raster arrangements for the optical viewing elements and all arrangementsfor. reducing and eliminating reflections and stray light.

When the form halves 59 and 60 are separated, along the line H in FIGS. 4, 5, the slides 63, 64 follow the opening motion of the left half 59, as shown in FIG. 5 by the arrow designated A. The slides 63, and 64 then glide onto the inclined outer surfaces 61, 62 of the tapered portion 60c, into the position shown in FIG. 5. The form slide projections 65a, 65b, 66a, 66b, 67a, 67b move thereby out of the upper camera outer wall 1a, and out of the lower viewer housing wall 2a. These form' slide projections form the recesses 7a, 7b, 12a, 12b for the spring element 8a, 8b and 13a, 13b, the spring abutment 6a, 6b and 11a, 11b, as well as the recesses 1g, 2g for holding the viewer covering plate 45. In this manner, the unit halves 59 and 60 can now separate still further beyond the position shown in FIG. 5. The form slides 63 and 64 can thereby come out of the interior space 2d of the viewer housing 2, and the camera housing 1 can be taken from the unit half 59 with attached viewer housing 2.

FIGS. a and 5b'illustrate two further possible embodiments for the construction of the plastic unit. In FIG. 5a, the inner surfaces 1f, 2f are formed with all of the mentioned arrangements through the form slider 69,70. After withdrawal of the inclined plane 71 in the direction of the arrow B, the slider 69, 70 moves in the direction of the arrow C, and releases the inner surfaces 1f, 2f with their projection 65a, 65b, 66a, 66b and 67a, 67b. After return of the portion 72 in the direction of the arrow B, the unit halves 74, 75 become separated along the separating lines III-Ill, and the completed part can be taken from the unit.

In the embodiment of FIG. 5b, the thrust element 76 first moves in the direction of the arrow E, and presses with its actuating portion 76a, 76b against the abutting portion 78a, 79a of the swingable portion 78, 79. The latter rotates about its pivot point 78b, 79b in the direction of the arrow F, and releases the inner surface If, 2f of the viewer housing 2 with all of its attached arrangements. Afterwards, the unit halves 80, 8a may become separated along the separating lines IV-IV' for the purpose of producing a separate viewer housing with all advantages that have been described. The construction is then secured to the camera housing in the conventional manner. The assembly of the light frame viewer is performed so that the ocular lens 18 is first brought from the interior in front of the viewer entrance opening 17. This occurs in the following manner:

The ocular lens 18 is placed within the viewer inner space 2d in front .of the viewer entrance opening 17, so that the heel 18a lies behind the retaining ribs 17a, shown in FIG. 2a, and the attached projection 18b lies to the right or to the left, next to the retaining projection 17b, shown in FIG. 2b. The ocular lens 18 becomes then displaced to the center of the viewer entrance opening 17, and moves thereby with its attached projection 18b behind the retaining projection 17b attached to the housing. With proper dimensioning, a pressed fit can be realized for holding the ocular lens 18 in the fixed location provided for this purpose.

In another way, in accordance with FIGS. 20 and 2d, the ocular lens 18 is placed at the center of the viewer entrance opening 17. This is also performed so that the projection 18a lies behind the retaining ribs 17a, and the ocular lens 18 becomes then pressed with its attached portion 18b behind the spring tongue 18b. The latter extends from a U-shaped recess l8e in the camera outer wall In and is firmly seated, shown as FIG. 2c. Thereafter, the mirrors 3 and 9 can be displaced to the front between support 4a, 5a, 4b, 5b and 9a, a, 9b, 10b and spring support 6a, 6b, and 11a,

11b. Similarly, the collimating lens 15 is pressed between the retaining ribs 14a, 14b. The completed assembly with strip 39, incandescant lamp 41, covering housing 35, photo resistor 21, diaphragm sleeve 24 and diaphragm disc 27 provided on the light frame plate 20, is then brought into the surrounding recess 19 of the supporting rim at the front of the viewer housing 2. The viewing cover disc 45 is also placed upon the light frame plate 20 and pressed thereon. The viewing covering this 45 grips with its attached portion 45a, 45b into the recesses 13, 2g, and prevents falling out of the light frame plate 20 during subsequent assembly procedures.

After termination of all operating procedures, the camera cover 49 at the front side can be pressed onto the camera housing 1, at the end. The camera covering 49 can be held therein place through screws or holding tongues, not shown. At the same time, the light frame plate 20 and viewer covering date 45 reach into the recess 50, and become secured, additionally, against falling out and sidewise movement, in conjunction with the supporting rim 51 and the abutting rim 48 of the camera covering 49.

For operation of the control or indicating arrangement, the incandescent lamp 41 and photoresistor 21 are elements of an electronic circuit. The incandescent lamp 41 lights, for example, when the photo resistor 21 registers light intensity which drops below a predetermined threshhold.

When the lamp 41 lights, the photographic symbols 37, 38 on'the strip 39, become projected onto the upper surface mirror 13. With the aid of the partially transmitting mirror 9, these symbols become visible within the viewer. The symbols 37, 38 provide the camera user in this case, for example, with definite indication that the prevailing brightness or light intensity is not sufficient for proper exposures. They also indicate-that a flashbulb must be used for exposures of short duration, or that a tripod must be used for exposures of long duration.

While the invention has been described and illustrated with respect to certain preferredexamples which give satisfactory results, it will be understood by those skilled in the art after understanding the principle of the invention, that various changes and modifications may be made without departing from the spirit of the invention.

What is claimed is:

1. A camera housing and camera viewer comprising, in combination, a box-shaped viewer housing open at the front end of said housing; a plurality of separate viewer elements enclosed within said housing, the interior of said viewer housing being bounded at the rear, top, bottom and sides by housing walls integrally formed as a one-piece member with the camera housing; a removable cover closing said viewer housing at the camera front end; fastening means for fastening in place said viewer elements; and means for reducing stray light and reflections, said fastening means and said means for reducing stray light and reflection extending into the interior of said viewer housing andv being integrally formed with the viewer housing walls.

2. The camera viewer as defined in claim 1 wherein said fastening means comprises spring elements.

3. The camera viewer as defined in claim 1 wherein said fastening means comprises support, clamping, retaining and receiving arrangements.

4. The camera viewer as defined in claim 1 wherein said means for reducing stray light and reflection comprises ribs, projection, and studs.

5. The camera viewer as defined in claim 1 wherein at least part of said fastening means and said means for reducing stray light are recessed within the interior surfaces of said viewer housing.

6. The camera viewer as defined in claim 1 wherein said fastening means and means for reducing stray light and reflection comprise formed displaceable elements.

7. The camera viewer as defined in claim 6 wherein said displaceable elements are pivotally mounted.

8. The camera viewer as defined in claim 1 including a camera housing formed integrally with said camera viewer housing, said box-shaped viewer housing being formed from the rear wall of said camera housing and the exterior walls of said camera housing.

9. The camera viewer as defined in claim 1 including cover means for closing the front opening of said viewer housing said cover being supported on a rim portion of a recess in one side of said housing, said cover having openings for generating a visible light frame field border within said viewer.

10. The camera viewer as defined in claim 9 wherein said cover has an opening for transmitting the viewer ray of light and an integral closure wall for closing an assembly recess in the side wall of said viewer housing.

11. The camera viewer as defined in claim 10, wherein said cover is provided with an integral closure wall for closing an assembly recess in the side wall of said viewer housing.

12. The camera viewer as defined in claim 9 including signal carrying means in front of an opening of said cover; an upper surface mirror for projecting signals from said signal carrying means; a partially transmitting mirror cooperating with said surface mirror for projecting said signals within the picture field of said viewer.

13. The camera viewer as defined in claim 12, wherein the signal carrying means and said opening of said cover are positioned in between the openings generating the visible light frame field border.

14. The camera viewer as defined in claim 13 including for said signal carrying means a transparent plate, said plate being provided with symbols; and lamp means for illuminating said signal carrying means. 15. The camera viewer as defined in claim 9 including a photo resistor within a recess at the center of said cover; a diaphragm sleeve for retaining said photo resistor in place; and a diaphragm disc attached to said diaphragm sleeve.

16. The camera viewer as defined in claim 15 including lamp means within said viewer; screening means for screening the light from said lamp means; and a rib integrally formed with said diaphragm sleeve, whereby said screening means and said diaphragm sleeve are of integral construction.

17. The camera viewer as defined in claim 15 including a viewing cover disc in front of said cover; and a collimating lens within said viewing cover disc for directing light onto said photo resistor.

18. T e camera viewer as defined in claim 17 including color means on said viewing cover disc for increasing the contrast of said light frame field border.

19. The camera viewer as defined in claim 17 including means on said viewer cover disc for securing at least part of said viewer elements after assembly of said camera viewer.

20. The camera viewer as defined in claim 17 including supporting rim means for securing against slippage said cover and said viewing covering disc.

21. The camera viewer as defined in claim 1 including an occular lens; retaining rib means on one side of said ocular lens for securing said ocular lens; and spring means on the other side of said occular lens for securing said ocular lens in place.

22. The camera viewer as defined in claim 1, wherein said housing walls are integrally formed with the camera housing from the rear wall and from the exterior wall of said camera housing.

23. The camera viewer as defined in claim 22, wherein said fasteining means are on two of the walls of said viewer housing, said two walls being opposite relative to each other. 

1. A camera housing and camera viewer comprising, in combination, a box-shaped viewer housing open at the front end of said housing; a plurality of separate viewer elements enclosed within said housing, the interior of said viewer housing being bounded at the rear, top, bottom and sides by housing walls integrally formed as a one-piece member with the camera housing; a removable cover closing said viewer housing at the camera front end; fastening means for fastening in place said viewer elements; and means for reducing stray light and reflections, said fastening means and said means for reducing stray light and reflection extending into the interior of said viewer housing and being integrally formed with the viewer housing walls.
 2. The camera viewer as defined in claim 1 wherein said fastening means comprises spring elements.
 3. The camera viewer as defined in claim 1 wherein said fastening means comprises support, clamping, retaining and receiving arrangements.
 4. The camera viewer as defined in claim 1 wherein said means for reducing stray light and reflection comprises ribs, projection, and studs.
 5. The camera viewer as defined in claim 1 wherein at least part of said fastening means and said means for reducing stray light are recessed within the interior surfaces of said viewer housing.
 6. The camera viewer as defined in claim 1 wherein said fastening means and means for reducing stray light and reflection comprise formed displaceable elements.
 7. The camera viewer as defined in claim 6 wherein said displaceable elements are pivotally mounted.
 8. The camera viewer as defined in claim 1 including a camera housing formed integrally with said camera viewer housing, said box-shaped viewer housing being formed from the rear wall of said camera housing and the exterior walls of said camera housing.
 9. The camera viewer as defined in claim 1 including cover means for closing the front opening of said viewer housing said cover being supported on a rim portion of a recess in one side of said housing, said cover having openings for generating a visible light frame field border within said viewer.
 10. The camera viewer as defined in claim 9 wherein said cover has an opening for transmitting the viewer ray of light and an integral closure wall for closing an assembly recess in the side wall of said viewer housing.
 11. The camera viewer as defined in claim 10, wherein said cover is provided with an integral closure wall for closing an assembly recess in the side wall of said viewer housing.
 12. The camera viewer as defined in claim 9 including signal carrying means in front of an opening of said cover; an upper surface mirror for projecting signals from said signal carrying means; a partially transmitting mirror cooperating with said surface mirror for projecting said signals within the picture field of said viewer.
 13. The camera viewer as defined in claim 12, wherein the signal carrying means and said opening of said cover are positioned in between the openings generating the visible light frame field border.
 14. The camera viewer as defined in claim 13 including for said signal carrying means a transparent plate, said plate being provided with symbols; and lamp means for illuminating said signal carrying means.
 15. The camera viewer as defined in claim 9 including a photo resistor within a recess at the center of said cover; a diaphragm sleeve for retaining said photo resistor in place; and a diaphragM disc attached to said diaphragm sleeve.
 16. The camera viewer as defined in claim 15 including lamp means within said viewer; screening means for screening the light from said lamp means; and a rib integrally formed with said diaphragm sleeve, whereby said screening means and said diaphragm sleeve are of integral construction.
 17. The camera viewer as defined in claim 15 including a viewing cover disc in front of said cover; and a collimating lens within said viewing cover disc for directing light onto said photo resistor.
 18. The camera viewer as defined in claim 17 including color means on said viewing cover disc for increasing the contrast of said light frame field border.
 19. The camera viewer as defined in claim 17 including means on said viewer cover disc for securing at least part of said viewer elements after assembly of said camera viewer.
 20. The camera viewer as defined in claim 17 including supporting rim means for securing against slippage said cover and said viewing covering disc.
 21. The camera viewer as defined in claim 1 including an occular lens; retaining rib means on one side of said ocular lens for securing said ocular lens; and spring means on the other side of said occular lens for securing said ocular lens in place.
 22. The camera viewer as defined in claim 1, wherein said housing walls are integrally formed with the camera housing from the rear wall and from the exterior wall of said camera housing.
 23. The camera viewer as defined in claim 22, wherein said fasteining means are on two of the walls of said viewer housing, said two walls being opposite relative to each other. 